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page.go
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package server
const HTML = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
<title>上传文件</title>
<style>
body {
margin: 15px auto auto 20px;
}
input[type='text'],
input[type='button'] {
font-size: 16px;
color: #000;
border-radius: 4px;
border: 1px solid #ccc;
}
.inputDiv {
margin: 10px auto;
}
.dropzone {
width: 300px;
height: 100px;
border: 1px dashed gray;
text-align: center;
padding: 40px;
font-size: 20px;
color: darkgray;
}
.inputDiv span {
float: left;
width: 40px;
}
.inputDiv.result span {
width: 20px;
}
.inputDiv input[id='token'] {
width: 280px;
}
.inputDiv input.verify {
width: 50px;
}
.inputDiv input[id='path'] {
width: 335px;
}
.inputDiv input[id='save'] {
float: right;
margin-right: 5px;
}
.inputDiv .sub {
width: 380px;
height: 30px;
}
.dangerous {
color: red;
}
.progress {
width: 0px;
height: 0px;
line-height: 0px;
border-bottom: 2px solid green;
display: none;
}
</style>
</head>
<body>
<div class="progress" id="progress"></div>
<form method="post" enctype="multipart/form-data" id="upload">
<div class="inputDiv dangerous" id="errMsg"></div>
{{ if .token }}
<div class="inputDiv">
<span>凭证: </span>
<input type="text" id="token" value="" name="token" placeholder="输入token" />
<input type="button" value="验证" class="verify" onclick="verify()" />
</div>
{{ end }}
<div class="inputDiv">
<span>目录: </span><input type="text" id="path" name="path" value="" placeholder="上传文件的目录, 不能以/开头或者结尾" />
</div>
<div class="inputDiv">
<div>
<span>文件: </span><input type="file" id="file" name="file" />
</div>
</div>
<div class="dropzone" ondragover="event.preventDefault();" ondrop="handleDrop(event)">将文件拖到此处或点击选择文件</div>
<div class="inputDiv">
<div class="sub">
<input type="submit" id="save" name="save" />
</div>
</div>
<div class="inputDiv result">
<ol class="filelist">
</ol>
</div>
</form>
<script>
var waitClear = false;
setInterval(function(){
var errMsg = document.getElementById("errMsg").innerHTML;
console.log("定时检查错误: ", errMsg);
if (errMsg !== "" && !waitClear) {
waitClear = true;
setTimeout(function(){
console.log("清理错误提示", errMsg);
document.getElementById("errMsg").innerHTML = "";
}, 5000);
};
}, 1000);
function verify() {
var token = document.getElementById("token").value;
if (token == "" || path == "") {
document.getElementById("errMsg").innerHTML = "请填写凭证";
return;
}
var xhr = new XMLHttpRequest();
xhr.open("GET", "/verify?token=" + token);
xhr.onload = function () {
console.log(xhr.responseText);
if (xhr.status === 200) {
var result = JSON.parse(xhr.responseText)
if (result.code != 200) {
console.log("验证失败!");
document.getElementById("errMsg").innerHTML = xhr.responseText;
return
}
document.getElementById("token").value = result.data;
document.getElementById("errMsg").innerHTML = "";
} else {
console.log("验证失败: " + xhr.responseText);
document.getElementById("errMsg").innerHTML = xhr.responseText;
}
};
xhr.send()
}
function handleDrop(e) {
e.stopPropagation();
e.preventDefault();
var files = e.dataTransfer.files; //获取被拖动的文件列表
var formData = new FormData();
{{ if .token }}
var v = document.getElementById("token").value;
if (v === "") {
document.getElementById("errMsg").innerHTML = "凭证为空";
return
}
formData.set("token", v);
{{ end }}
formData.set("path", document.getElementById("path").value);
for (var i = 0; i < files.length; i++) {
var file = files[i];
console.log(file);
formData.append('file', file); //将文件添加到FormData对象中
}
formData.append('ajax', 1); // 是否为 ajax请求组
var xhr = new XMLHttpRequest();
xhr.upload.addEventListener("progress", updateProgress);
xhr.upload.addEventListener("load" , transferComplete);
xhr.upload.addEventListener("error", transferFailed );
xhr.upload.addEventListener("abort", transferCanceled);
xhr.open("POST", "/upload"); //设置上传URL为服务器接收文件的地址
// 上传进度
function updateProgress (event) {
// 如果 lengthComputable 属性的值是 false,那么意味着总字节数是未知并且 total 的值为零。
if (event.lengthComputable) {
let p = event.loaded / event.total * 100;
console.log('上传进度:' + p + '%') // 一个百分比进度
let v = p * 380 / 100;
if (v > 380) {
v = 380
}
console.log("width value: "+ v)
document.getElementById('progress').style.width = (v) + "px";
} else {
// 总大小未知时不能计算进度信息
}
}
function transferComplete(event) {
console.log("上传完成");
document.getElementById('progress').style.width = "380px";
setTimeout(function(){
document.getElementById('progress').style.display= "none";
}, 3000);
}
function transferFailed(event) {
console.log("上传失败");
document.getElementById('progress').style.width = "0px";
}
function transferCanceled(event) {
console.log("取消上传");
document.getElementById('progress').style.width = "0px";
}
xhr.onload = function () {
if (xhr.status === 200) {
console.log("文件上传成功!");
var result = JSON.parse(xhr.responseText)
if (result.code === 200) {
var names = result.data;
for (var i = 0; i < names.length; i++) {
addToFileList(names[i]); //显示已上传的文件名称
}
{{ if .token }}
document.getElementById("token").value="";
{{ end }}
return
}
} else {
console.log("文件上传失败!错误信息: " + xhr.responseText);
document.getElementById("errMsg").innerHTML = xhr.responseText;
}
};
xhr.send(formData);
document.getElementById('progress').style.display= "block";
}
function addToFileList(fileName) {
var ulElement = document.querySelector('.filelist');
var liElement = document.createElement('li');
liElement.textContent = fileName;
ulElement.appendChild(liElement);
}
</script>
</body>
</html>
`